People had asked this many times and that is why they came up with methods and standards that will answer these type of questions. You can look it up in the NIST or the National Institute for Standards and Technology.
Answer:
10 km/hr
Explanation:
We are told that a jogger runs;
3km in 0.3 hr and
7 km in 0.7 hr
We are required to determine the average speed;
We need to know that average speed is given by;
Average speed = Total distance ÷ total time
In this case;
Total distance = 10 km ( 3km + 7 km)
Total time = 0.3 hr + 0.7 hr
= 1 hr
Thus;
Average speed = 10 km ÷ 1 hr
= 10 km/hr
Therefore, the average speed of the jogger is 10 km/hr
Answer:
A
Explanation:
I took a test like this and my teacher said this was right so ye. hopefully I remembered correctly if its wrong im sorry ;C
Answer: Option (c) is the correct answer.
Explanation:
Momentum is the product of mass and velocity.
Mathematically, p = m × v
where p = momentum
m = mass
v = velocity
It is known that mass can be measured in Kilograms or grams. Whereas velocity is measured in meter per second or centimeter per minute or hour.
On the other hand, unit kilometer is a unit of distance and not mass.
Thus, out of the given options km.m/s is not an appropriate unit for momentum.
